Thumb sleeve



FIG. 1 depicts a use of a thumb sleeve in accordance with the present invention.

FIG. 2 depicts a side view of the thumb sleeve in accordance with the present invention.

FIG. 3 depicts a perspective view of the thumb sleeve in accordance with the present invention.

FIG. 4 depicts a view of an interior opening of the thumb sleeve in accordance with the present invention.

The broken lines in FIG. 1 depict environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a THUMB SLEEVE, as shown and described. 